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2024年9月8日发(作者：士楚云)

D661 Series

ISO 4401 Size 05

Installation and Operation Instruction

Servo and Proportional Control Valves with Integrated Electronics

1. INTRODUCTION

This manual provides instructions and procedures necessary

to install, operate and troubleshoot the Moog D661 Series Servo and Propor-

tional Control Valves.

Series Models

Series GServovalve with nozzle-flapper or ServoJet

pilot

stage, spool in bushing, without additional mechanical

feedback

Servovalve configured like version G, but with additional

mechanical feedback

Servovalve configured like version S, but with improved

performance (high response)

Proportional valve with ServoJet

pilot stage, spool in body,

without additional mechanical feedback

Proportional valve configured like A/B, but

with nozzle flapper pilot stage and additional mechanical

feedback

Series S

Series H

A/B

F/G

2. OPERATION

General

The Servovalves D661-G, S and H Series and the Proportional Flow

Control Valves D661-P Series are throttle valves for 2-, 3- and 4-way

applications. With proportional flow control valves, 5-way applications are also

possible. These valves are suitable for electrohydraulic position, velocitiy,

pressure or force control systems with high dynamic response requirements.

D661-G, S and H

The spool of the main stage is driven by a nozzle flapper or ServoJet

pilot stage, optional with or without additional mechanical feedback (nozzle

flapper only).

With versions D661-S and H in case of an electrical supply failure

the spool is moved into a preferred position by action of an additional

mechanical feedback.

ELECTROHYDRAULIC VALVE CUT-AWAY

Screw Plug for Null Adjust

Bushing

Spool

Connector

CAUTION

DISASSEMBLY, MAINTENANCE, OR REPAIR OTHER THAN IN ACCORDANCE WITH THE

INSTRUCTIONS HEREIN OR OTHER SPECIFIC WRITTEN DIRECTIONS FROM MOOG WILL

INVALIDATE MOOG’S OBLIGATIONS UNDER ITS WARRANTY.

XTAPBT

Figure 1 Moog Series D661-G Series, without additional mechanical feedback

Operating Principle of the Two-Stage Valve

An electric input signal (flow rate command) is applied to the integrated

control amplifier which drives a current through the coils of the pilot stage

torque motor. Thus the deflected nozzle-flapper system produces a pressure

difference across the drive areas of the spool and effects its movement. The

position transducer which is excited via an oscillator measures the position

of the spool (actual value, position voltage).

This signal is then rectified by a demodulator and is fed back to the control

amplifier where it is compared with the command signal. The control amplifier

drives the torque motor until command voltage and feedback voltage are equal.

Thus, the position of the spool is proportional to the electric command signal.

Servovalve D661 - ...S and H

Series with additional

mechanical feedback

Proportional Flow Control P

The nozzle flapper design of the pilot stage has been converted into an

improved version with jet pipe amplifier (ServoJet

2- stage Proportional Valve

P...A/B Series

Annular

area

Jet pipe

NozzleReceiver

The ServoJet

pilot stage consists mainly of torque motor, jet pipe and

receiver.

A current through the coil displaces the jet pipe from neutral. This

displacement combined with the special shape of the nozzle directs a focussed

fluid jet more into one receiver bore than into the other.

The jet now produces a pressure difference in the control ports. This

pressure difference results in a pilot flow, which in turn causes a spool

displacement. The pilot stage drain is through the annular area around the

nozzle to tank.

Operating Principle of the Two-Stage Valve

An electric input signal (flow rate command) is applied to the integrated

control amplifier which drives a current through the coil of the pilot stage

torque motor. The thus deflected jet pipe produces a pressure difference

across the drive areas of the spool and effects its movement.

The position transducer which is excited via an oscillator measures the

position of the spool (actual value, position voltage). This signal is then

demodulated and fed back to the controller where it is compared with the

command signal. The controller drives the torque motor until the error

between command signal and feedback signal is zero. Thus the position of the

spool is proportional to the electric command signal.

Failsafe P

For applications with proportional control valves where certain safety

regulations are applicable, a defined metering spool position is needed in order

to avoid potential damage. Therefore, failsafe versions are offered as an

option for the MOOG proportional valves.

After external triggering, this failsafe function causes a defined metering

spool position.

Mechanical Failsafe version (biased pilot stage with mechanical feedback)

The safe position of the spool will be obtained after cut off of pilot

pressure supply (external pilot connection) or operating pressure supply

(internal pilot connection).

This safe position can only be obtained with <1 bar pilot pressure.

ATTENTION

A/BW

Proportional Valve

A/BW

A/BU Series

with electrically operated

failsafe function

Proportional Valve

AP Series

with electrically operated

failsafe function

With failsafe versions R and L, a defined spool position is reached

when the electric supply to the valve electronics is switched off

while the pilot pressure is still applied. With version M, the resulting spool

position is undefined.

ATTENTION

Electric characteristics of the 2/2-way solenoid valve

Connector wiring

Function

Nominal voltage

Nominal power

electro magnetic

24 VDC

12 W

DIN 43650-1

Form A: 2+PE-PG9

Electrically operated failsafe version

The safe position of the spool will be obtained after switching off the

integrated 2/2-way solenoid seat valve.

With failsafe versions W, U and G, after cut-off of the solenoid, the

spool moves to midposition. When the electric supply to the valve

electronics is switched off while the pilot pressure is still effective and the solenoid

is still switched on, the spool will move to a defined end position with versions U

and G.

ATTENTION

Cutting off the 24 VDC supply to the solenoid operated 2/2-way

seat valve

To protect relay contacts or semiconductors against damage, a Zener

diode is required

Consider inductive load of the solenoid coil!

ATTENTION

With failsafe version P, the integrated seat valve will shut off the

external pilot pressure after switching off the solenoid.

ATTENTION

Technical Data

(for code letter of valve version see pages 18/19)

Mounting patternISO 4401, version G.. with second tank port

With B 5-way version, the port

designated T

is used as second pressure port P

Mass

Rated flow Q

at Dp

= 5 bar per land, tolerance ±10 %

Null leakage flow

)total, max.

Pilot leakage flow)pilot stage only

Pilot flow

)max, for 100% step input

Max. operating pressure p

max

Main stageports P, A, B

port T, (T

) with Y internal

port T, (T

) with Y external

Pilot stageregular version

with dropping orifice (on request)

Temperature rangeAmbient

Fluid

Operating fluid

ATTENTION

GS...FS...G

ISO 4401-05-05-0-94

HP...AP...B

ISO 4401-05-05-0-94

[kg]

[l/min]

[bar]

[°C]

5.75.54.2

see nameplate of the valve

3.0 to 5.0 (S...F 2.5 to 4.0)

2.51.42.5

5.55.64.7

see nameplate of the valve

3.5

1.7

4.4

2.6

2.5

Viscosity

System filter

recommended

allowable

[mm

/s]

[mm

/s]

350350

20% of pilot pressure, max.100210

350350

210280

350350

- 20 to + 60- 20 to + 60

- 20 to + 80- 20 to + 80

mineral oil based hydraulicmineral oil based hydraulic

fluid according to DIN 51524,fluid according to DIN 51524,

part 1 to 3, others upon requestpart 1 to 3, others upon request

5 to 4515 to 45

5 to 4005 to 400

High pressure filter, mountedHigh pressure filter, mounted

in the main flow withoutin the main flow without

bypass, but with dirt alarmbypass, but with dirt alarm

16 / 13 or better

)

7 or better

)

75 (15 µm absolute)

75 (10 µm absolute)

16 / 13 or better

)

7 or better

)

75 (15 µm absolute)

75 (10 µm absolute)

Class of cleanliness according to

ISO 4406

NAS 1638

Filter ratingfor normal operation

for longer life

)With version P at 210 bar pilot or operating pressure,

with versions G,S and H at 140 bar pilot or operating pressure,

fluid viscosity of 32 mm˝/s and fluid temperature of 40°C.

)For long life wear protection of metering lands

For additional technical information such as

dimensions, ordering information, etc., see the

D660 series catalog.

3. SAFETY INSTRUCTIONS

Warnings and Symbols

to special orders and prohibitions to prevent damage

ATTENTION

to special orders and prohibitions to prevent injury or

DANGER

extensive damage

Correct Application

D661 Series Valves are control valves suited for electrohydraulic

position, velocity, pressure and force control.

valves are designed for flow control in hydraulic systems that

operate with mineral oil based fluids. Others upon request.

the valves for purposes other than those mentioned above is

DANGER

considered contrary to the intended use. The user bears entirely the

risk of such misuse.

t application involves also observing the operating instruction and

complying with the inspection and maintenance directives.

Organizational Measures

recommend including this operating instruction into the

maintenance plan of the machine/plant.

addition to the operating instruction, observe also all other generally

applicable legal and other mandatory regulations relevant to accident

prevention and environmental protection. Instruct the operator

accordingly.

safety and danger prevention instructions of the machine/plant must

meet the requirements of EN 982.

Selection and Qualification of Personnel

well-trained and instructed personnel are allowed to work with Moog

control valves.

with electrohydraulic valves must be carried out only by personnel

having special knowledge and experience in plants running with

electrohydraulic controls.

Safety Instructions for Specific Operational Phases

the necessary precautions to ensure that the machine/plant is

used only when in a safe and reliable state.

the machine/plant at least once per working shift for obvious

damage and defects (i.e. leakage). Report any changes to the responsible

group/person immediately. If necessary, stop the machine immediately

and secure it.

the event of malfunctions, stop the machine/plant immediately and

secure it. Have any defects rectified immediately.

the machine/plant is completely shut down for maintenance and repair

DANGER

work at the valve, it must be secured against inadvertent start up by:

➢ Locking the principal control elements and removing the key.

➢ Attaching a warning sign to the main switch.

Safety Instructions for the Operation of Hydraulic Plants

on electrohydraulic equipment must be carried out only by personnel

having special knowledge and experience in electrohydraulic controls.

all lines, hoses and fittings of the plant regularly for leaks and

DANGER

obvious damage. Repair damage immediately.

Splashed oil may cause injury and fire.

removing the valve, depressurize all system sections to be

DANGER

opened, pressure lines and accumulators of the hydraulic system

in accordance with the specific instructions for the plant.

handling oil, grease and other chemical substances, observe safety

regulations valid for each product.

4. INSTALLATION

General Information

e model number and valve type with information from the

hydraulic schematic or bill of material.

valve can be mounted in any direction, fixed or moving.

mounting surface flatness (0.02 mm for 100 mm) and

surface finish (Ra <1 µm)

attention to cleanliness of mounting surface and surroundings when

installing the valve.

lint-free tissue to clean!

installation, remove shipping plate from the valve and save it

for later use.

attention to correct position of ports and location of o-rings during

installation.

M6 x 60 socket head bolts according to DIN 912 for mounting,

strength class 10.9 or 12.9, and cross torque to 13 Nm (tolerance ±10 %)

Internal/External Pilot Connection

sion for operation with internal or external pilot connection.

The pilot connection mode as shipped is indicated by the respective

code letter of the type designation on the nameplate.

With the 5-way version, where the T and T

ports are interchanged

ATTENTION

with the P port, pilot supply port X and return port Y must be

connected externally.

sion instruction for Servovalves D661-G and Proportional

A/B

Servovalve D661 G

without mechanical feedback

and Proportional Valve A/B

Electric

Null adjust

(behind screw plug)

Filter

)PY

Set screw 4Set screw 2Set screw 1Set screw 3

M4 x 6M4 x 6M4 x 6M4 x 6

) Check for sufficient length (100 mm) of mounting surface!

ATTENTION

Pilot FlowSet Screw M4 x 6

Supplybore 1bore 2

Internal Pclosedopen

External Xopenclosed

Pilot FlowSet Screw M4 x 6

Returnbore 3bore 4

Internal Tclosedopen

External Yopenclosed

sion instruction for Servovalves D661-S, H F/G

Electric

Nulladjust

(behind screw plug)

Filter

screw plug

M4 x 8 DIN 6912-8.8

with metal sealring

U4,5-7-1

Pilot FlowScrew Plug

SupplyIn Port

Internal PX

External XP

5. SETTING UP

This information is valid for new installations to be put into operation

as well as for repair cases.

Filling the Hydraulic System

New oil is never clean. Therefore, the system should generally be

ATTENTION

filled by using a filling fine mesh filter should at least comply

with the following requirement: ß

≈ 75 (10 µm absolute).

Flushing the Hydraulic System

Before the hydraulic system is put into operation for the first

ATTENTION

time (also after modifications), it has to be flushed carefully

according to the instructions of the manufacturer of the plant / machine.

flushing, suitable flushing elements have to be inserted in the

pressure filters instead of the high pressure elements.

flushing, the operational temperature of the hydraulic system

should be achieved. Observe temperature!

c.A flushing plate or, if the system allows, a directional valve should be

mounted in place of the Moog porportional valve. The P- and T-

connections are flushed through the flushing plate. The user A- and B-

connections can also be flushed by the directional valve.

Attention: The directional valve can lead to unpermissable

ATTENTION

movements in the load (i.e. with parallel drives), which may result

in damage of the plant / machine. Instructions of the manufacturer have

to be strictly observed.

Minimum flushing time t can be calculated as follows:

t =

V = content of reservoir [gallons]

• 5

Q = flow rate of the pump [gpm]

flushing process can be considered completed when a system

cleanliness of 15/12 according to ISO 4406 or 6 according to NAS

1638 or better is achieved. A long life of the metering lands of the

proportional valve can be expected for this cleanliness class.

e flushing elements in the pressure filters by suitable high

DANGER

pressure elements after flushing. Install Moog proportional valve

instead of flushing plate or directional valve.

Setting Up

up machine/plant according to the operation instructions of

ATTENTION

the manufacturer after the valves have been installed. Vent hydraulic

system!

safety instructions of the machine/plant manufacturer must be

observed. Especially the safety requirements for machines like injection

molding machines (EN 201), blow molding machines (EN 422) and die

casting machines (EN 869), to name a few, are important.

e oil temperature.

hydraulic system for external leakage!

6. MAINTENANCE

Besides regular visual inspection for external leakage and filter

ATTENTION

replacement, maintenance work at the D661 Series valves is not

required.

Explosion proof must not be opened by the

customer! Unauthorized opening will invalidate the explosion proof

approval! Return failed valve to the factory.

Moog valves can only be repaired at Moog Service Centers (for addresses

see back page of this operation instructions).

Filter Replacement

The built-in filter disk protects orifices and nozzles against coarse

contaminants. With severe contamination, the valve response will be reduced.

Replace filter!

ATTENTION

Cleaning the filter is useless and may be dangerous!

Before starting to work on the valve, clean the external surface

ATTENTION

around the filter cover!

ATTENTION

Attention: The filter disk (21) flows from inside to the outside.

After removal of the cover (20) any contamination particles are on the inside

of the disk (21) and therefore, cannot be seen from outside.

four internal hex bolts (38) using Allen wrench (3 mm). Remove

cover (20). Remove the filter disk (21) now accessible by using a scriber

or a fine screwdriver as extraction tool.

o-rings (59) and

(53) for damage.

Replace if

necessary.

S and H

...P...P...F/G

o-ring (53) first. Then insert the new filter disk (21) such that the

side with the notch at the rim points outward. Mount o-ring (59) on

the cover (20) using clean grease, and mount cover to the valve body.

Torque the four bolts (38) to 4 Nm (35 in-lb).

valve for external leakage after pressurizing it.

ELECTRONICS INFORMATION

Valve connectors

Possible connectors

Number

of Pins

6 + PE

11 + PE

11 + 1 (PE) Bayonet

6 (old, without PE)

12 (old, without PE) Bayonet

Supply Voltage

± 15 VDC24 VDC

–X

X–

ring output

Actual value 0 to ±10 V

The actual spool position value can be measured at pin F. This signal

can be used for monitoring and fault detection purposes.

The spool stroke range corresponds to ±10 V. +10 V corresponds to

100% valve opening P ➔ A and B ➔ T.

Actual value 0 to ±10 mA

The actual spool position value can be measured at pin F. This signal

can be used for monitoring and fault detection purposes.

The spool stroke range corresponds to ±10 mA. +10 mA corresponds

to 100% valve opening P ➔ A and B ➔ T.

Please note information regarding input signals on the nameplate!

ATTENTION

Valve electronics with supply voltage ± 15 VDC and

6+PE pole connector

d input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve

opening P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V. At 0 V command

the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according to

the required operating direction (to be done at the mating connector).

Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I

–I

100% valve opening P➔A and B➔T is achieved at (I

–I

)

= +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction. The

unused pin is left open (not connected at the mating connector). The input

pins D and E are inverting.

General Requirements

➢ Supply ±15VDC ±3%. Ripple < 50 mV

. Current consumption max. ±250mA

➢ All signal lines, also those of external transducers, shielded

➢ Shielding connected radially to (0V), power supply side and connected to

the mating connector housing (EMC)

➢ EMC: Meets the requirements of EN 55011/03.91 class B,

EN 50081-1/01.92, and EN 50082-2/03.95, performance criterion class A

➢ Protective grounding lead ≥ 0.75mm

(AWG 16)

➢ Note: When making electric connections to the valve (shield, protective

grounding), appropriate measures must be taken to ensure that locally

different earth potentials do not result in excessive ground currents.

See also MOOG Application Note AM 353 E.

Connector Wiring - Type code S (see sticker on the electronics housing)

For valve with 6+PE-pole connector according DIN 43563, connector (metal) with leading ground pin (

Valve

side

ConnectorMating

connector

Cabinet

side

Function

Supply

Supply/signal ground

Input command

valve flow

Input inverted command

valve flow

Output actual value

spool position

Protective ground

Voltage command

Current command

+ 15 VDC ± 3%, ripple <50 mV

- 15 VDC ± 3%, ripple <50 mV

( 0 V )

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Output resistance 10 kΩ

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance max. 500 Ω

)Valves having code letter X at position 10 of type

designation: Command signal 10 mA between pins D

and E (differentially, internal resistance 1 kΩ).

Valve electronics with supply voltage ± 15 VDC and 11+1 pole

bayonet connector

Alternate connector for certain valve models

d input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve

opening P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V. At 0 V command

the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according to

the required operating direction (to be done at the mating connector).

Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I

– I

100% valve opening P ➔ A and B ➔ T is achieved at (I

– I

) = +10 mA. At 0 mA

command the spool is in the center position. Either pin D or E is used according

to the required operating direction. The unused pin is left open (not connected at

the mating connector). The input pins D and E are inverting.

Command signal 4 to 20 mA

The spool stroke of the valve is proportional (I

–12 mA). 100% valve

opeming P ➔ A and B ➔ T at I

= 20 mA. At 12mA command the spool is

in the center position.

The unused Pin E is left open (not connected in the mating connector).

ring output

The actual spool position value can be measured at pin F.

This signal can be used for monitoring and fault detection purposes.

Command signal 0 to ±10 V

The spool stroke range corresponds to ±10 V.

+10 V corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 0 to ±10 mA

The spool stroke range corresponds to ±10 mA.

+10 mA corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 4 to 20 mA

The spool stroke range corresponds to 4 to 20 mA.

20 mA corresponds to 100% valve opening P ➔ A and B ➔T.

ATTENTION

Please note "General Requirements" on page 6.

Connector Wiring - Type code V (see sticker on the electronics housing)

Valves with 11+1 pole bayonet connector to MIL C-26482-14-12 with leading protective grounding connection (K)

Mating connector: metal shell, Order-No.: B97027 012.

Valve

side

ConnectorMating

connector

Cabinet

side

Function

Supply

Supply/signal ground

Input command

valve flow

Voltage command

Current command

+ 15 VDC ± 3%, ripple <50 mV

( 0 V )

Current command

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 mA

Load resistance 400 Ω

4 to 20 mA

Load resistance 200 Ω

0 to ± 10 V

0 to ± 10 mA

Input inverted command

not used

Input resistance 100 kΩ

Load resistance 400 Ω

valve flow

0 to ± 10 V

0 to ± 10 mA4 to 20 mA

Output actual value

Output resistance 100 kΩ

Load resistance max. 500 ΩLoad resistance max. 500 Ω

spool position

Monitoring output of

internal position

controller

Not used

Protective ground

Relay output

Leading pin of valve connector

24 VDC, max. 0,5 A. For inductive loads a corresponding commutating diode is necessary.

The relay contact opens and the pilot stage is disconnected when supply voltage becomes less than 12 V

(thus also in case of cable break). The spool then moves to the determind position without electric

supply. Cable break of the ⊥ wire is not monitored.

Valve electronics with supply voltage

15 VDC and 6 pole connector

(without protective grounding)

d input

Command signal 0 to

10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve

opening P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V. At 0 V

command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according

to the required operating direction (to be done at the mating connector).

Command signal 0 to

10 mA

The spool stroke of the valve is proportional to (I

– I

100% valve opening P ➔ A and B ➔ T is achieved at (I

– I

)

= +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction. The

unused pin is left open (not connected at the mating connector). The input

pins D and E are inverting.

Command signal 4 to 20 mA

The spool stroke of the valve is proportional (I

–12 mA). 100% valve

opeming P ➔ A and B ➔ T at I

= 20 mA.

At 12mA command the spool is in the center position.

The unused Pin E is left open (not connected in the mating connector).

ring output

The actual spool position value can be measured at pin F.

This signal can be used for monitoring and fault detection purposes.

Command signal 0 to

10 V

The spool stroke range corresponds to ±10 V.

+10 V corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 0 to

10 mA

The spool stroke range corresponds to ±10 mA.

+10 mA corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 4 to 20 mA

The spool stroke range corresponds to 4 to 20 mA.

20 mA corresponds to 100% valve opening P ➔ A and B ➔

General Requirements

➢ Supply ± 15 VDC ± 3%. Ripple < 50 mV

. Current consumption max.

± 250 mA

➢ All signal lines, also those of external transducers, shielded

➢ Shielding connected radially to (0V)

➢Note: When making electric connections to the valve (shield, protective

grounding), appropriate measures must be taken to ensure that locally

different earth potentials do not result in excessive ground currents.

Connector Wiring - Type code 6

Valves with 6 pole connector to MIL C-5015/14S-6. Mating connector: metal shell, Order-No.: A26201 004

ValveConnector

MatingCabinet side

connector

FunctionVoltage command

0 to ± 10 V

Current command

0 to ± 10 mA

+ 15 VDC ± 3 %, ripple < 50 mV

– 15 VDC ± 3 %, ripple < 50 mV

(0V)

Current command

4 to 20 mA

Supply

Supply / signal ground

Input rated command

Valve flow

Input invert. rated command

Valve flow

Output actual value

Spool position

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Output resistance 10 kΩ

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance max. 500 Ω

4 to 20 mA

Load resistance 200 Ω

not used

4 to 20 mA

Load resistance max. 500 Ω

Valve electronics with supply voltage ± 15 VDC and 12 pole bayonet

connector (without protective grounding)

d input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve

opening P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V. At 0 V

command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according to

the required operating direction (to be done at the mating connector).

Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I

– I

100% valve opening P ➔ A and B ➔ T is achieved at (I

– I

)

= +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction. The

unused pin is left open (not connected at the mating connector). The input

pins D and E are inverting.

Command signal 4 to 20 mA

The spool stroke of the valve is proportional (I

–12 mA). 100% valve

opening P ➔ A and B ➔ T at I

= 20 mA. At 12mA command the spool

is in the center position.

The unused Pin E is left open (not connected in the mating connector).

ring output

The actual spool position value can be measured at pin F.

This signal can be used for monitoring and fault detection purposes.

Command signal 0 to ±10 V

The spool stroke range corresponds to ±10 V.

+10 V corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 0 to ±10 mA

The spool stroke range corresponds to ±10 mA.

+10 mA corresponds to 100% valve opening P ➔ A and B ➔ T.

Command signal 4 to 20 mA

The spool stroke range corresponds to 4 to 20 mA.

20 mA corresponds to 100% valve opening P ➔ A and B ➔T.

ATTENTION

Please note "General Requirements" on page 8.

Connector Wiring - Type code letter 0

Valves with 12 pole bayonet connector to MIL C-26482/14-12. Mating connector: metal shell, Order-No.: B97027 012.

ValveConnector

Mating

connector

Cabinet side

FunctionVoltage command

0 to ± 10 V

Current command

0 to ± 10 mA

+ 15 VDC ± 3 %, ripple < 50 mV

– 15 VDC ± 3 %, ripple < 50 mV

(0V)

Current command

4 to 20 mA

Supply

Supply / signal ground

Input rated command

Valve flow

Input invert. rated command

Valve flow

Output actual value

Spool position

Monitoring output of

internal position controller

not used

Relay output

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Input resistance 100 kΩ

0 to ± 10 V

Output resistance 10 kΩ

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance 400 Ω

0 to ± 10 mA

Load resistance max. 500 Ω

0 to ± 12 V

Output resistance 10 kΩ

4 to 20 mA

Load resistance 200 Ω

not used

4 to 20 mA

Load resistance max. 500 Ω

24 VDC, max. 0.5 A. For inductive loads a corresponding commutating diode is necessary.

The relay contact opens and the pilot stage is disconnected when supply voltage becomes less than

12 V (thus also in case of cable break). The spool then moves to the determind position without

electric supply. Cable break of the

⊥

wire is not monitored.

Valve electronics with supply voltage 24 Volt and 6+PE - pole

connector

d input

Command signal 0 to

10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve opening

P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V.

At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin B) according to

the required operating direction (to be done at the mating connector).

Command signal 0 to

10 mA

The spool stroke of the valve is proportional to (I

– I

). 100% valve opening

P ➔ A and B ➔ T is achieved at (I

– I

) = +10 mA. At 0 mA command the

spool is in the center position.

Either pin D or E is used according to the required operating direction.

The unused pin is left open (not connected at the mating connector).

The input pins D and E are inverting.

ring output

Actual value +2,5 to +13,5 V

Valves with voltage and current command input

The actual spool position value can be measured at pin F (see diagram

below). This signal can be used for monitoring and fault detection

purposes.

The spool stroke range corresponds to +2,5 to +13,5 V. The center

position is at +8 V. +13,5 V corresponds to 100% valve opening P ➔ A

and B ➔ T.

General Requirements

➢ Supply 24 VDC, min.19 VDC, max. 32 VDC. Current consumption

max. 300 mA

➢ All signal lines, also those of external transducers, shielded

➢ Shielding connected radially to (0V), power supply side, and connected

to the mating connector housing (EMC)

➢EMC: Meets the requirements of EN 55011/03.91 class B,

EN 50081-1/01.92, and EN 50082-2/03.95, perf. crit. class A

➢Protective grounding lead > 0.75mm

(AWG 16)

➢Note: When making electric connections to the valve (shield, protective

grounding), appropriate measures must be taken to ensure that locally

different earth potentials do not result in excessive ground currents.

See also MOOG Application Note AM 353 E.

Circuit diagram for measurement of actual value U

(position of

main spool) for valves with 6+PE pole connector

Connector Wiring - Type code letter S (see sticker on the electronics housing)

Valves with 6+PE pole connector to DIN 43 563 and mating connector (metal shell) with leading protective ground connection ()

ValveConnector

MatingCabinet side

connector

Function Voltage command

Supply

Supply / signal ground

Enabled

)

Not enabled

Input rated command

(differential)

Output actual value

Protective grounding

Current command

24 VDC (min. 19 VDC, max. 32 VDC) I

max

: 300 mA

(0V)

C-B

> +8.5 VDC

C-B

< +6.5 VDC

D-E

: 0 to ± 10 V

: 10 kΩ

D-B

and U

E-B

max.: –15 V

max.: +24 V

= 1.2 mA at 24 VDC

Input command referenced to ⊥I

D-E

: 0 to ± 10 mA

(load resistance 200 Ω)

Input command (invert.)I

E-D

: 0 to ± 10 mA

F-B

: +2.5 to +13.5 V. At +8 V spool in centered position

: approx. 15 kΩ

) With enable signal < +6.5 V the spool moves into the position adjusted for 0 V command signal.

Valve electronics with supply voltage 24 Volt and 11+PE - pole connector

d input

Command signal 0 to

10 V

The spool stroke of the valve is proportional to (U

– U

). 100% valve opening

P ➔ A and B ➔ T is achieved at (U

–U

) = +10 V. At 0 V command the spool is

in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin B) according to

the required operating direction (to be done at the mating connector).

Command signal 0 to

10 mA

The spool stroke of the valve is proportional to (I

– I

). 100% valve opening P➔A

and B ➔ T is achieved at (I

– I

) = +10 mA. At 0 mA command the spool is in

the center position.

Either pin D or E is used according to the required operating direction.

The unused pin is left open (not connected at the mating connector). The

input pins D and E are inverting.

ring output

Actual value 0 to

10 V

Valves with voltage and current command input

The actual value, i. e. the spool position, can be measured between pins 6 and

7. This signal can be used for monitoring and fault detection purposes. The

signal can only be measured using a weighted differential amplifier (see dia-

gram below) or a voltmeter with an input impedance greater than 1M

Ω

. The

spool stroke range corresponds to ±10 V. The centered position is at 0 V.

+10 V corresponds to 100% valve opening P ➔ A and B ➔ T.

If the actual value will be used with a machine control system, the differential

input circuit must be used. Another option is to use the aforementioned

circuit for the 6+PE pole connector. Pin 6 according to DIN 43 651

corresponds to pin F according to DIN 43 563 (see diagram page 12).

ATTENTION

Please note "General Requirements" on page 10.

Circuit diagram for measurement of actual value U

6-7

(position of

main spool) for valves with 11+PE pole connector

Valve connector

0...±10 V

Connector Wiring - Type code letter E (see sticker on the electronics housing)

Valves with 11+PE pole connector to DIN 43 651and mating connector (metal shell) with leading protective ground connection ()

ValveConnector

Mating

Cabinet side

Connector

Function

Supply

Supply / signal ground

Enabled

)

Not enabled

Input rated command

(differential)

Voltage command

24 VDC (min. 19 VDC, max. 32 VDC)

(0V)

3-2

> +8.5 VDC

3-2

< +6.5 VDC

4-5

: 0 to ±10 V

: 10 kΩ

4-2

and U

5-2

max.: –15 V

max.: +24 V

Current command

max

: 300 mA

= 1.2 mA at 24 VDC

Input command referenced to ⊥ I

4-5

: 0 to ±10 mA

(load resistance 200Ω)

Input command (invert.) ref. to ⊥ I

5-4

: 0 to ±10 mA

Output actual value

(differential)

Enable and Supply

acknowledged

not used

Position error

Protective grounding

6-7

: 0 to ±10 V

: approx. 20 KΩ

8-2

> +8.5 VDC: ok

8-2

< +6.5 VDC: not ok

Output I

max

: 20 mA

Note: With valve models D661-27XX and D661-29XX supply voltage is at pin 9 and signal

ground at pin 10.

Pins 1 and 2 are not used.

11-2

> +8.5 VDC: <30 %

11-2

< +6.5 VDC: >30 %

Output I

max

: 20 mA

) With enable signal < +6.5 V the spool moves into the position adjusted for 0 V command signal.

7. ELECTRICAL NULL ADJUSTMENT

The hydraulic null of the valve is preset at the factory with a tolerance

of ± 2% of rated signal. If necessary, this null can be readjusted by the user of

the valve.

e operating instructions for the machine/plant.

DANGER

Valves with +4 to +20 mA command signal: Do not adjust valve

null! Contact machine/plant manufacturer.

ure: Remove the command signal to the valve only by

disconnecting command signal lead at the cabinet.

ATTENTION

Do not remove valve mating connector!

Remove cover screw on electronics housing to access the null adjust

potentiometer. Use a small screwdriver (blade width 2.5 mm) to turn

the potentiometer screw either clockwise or counterclockwise. Usually

it will not be necessary to turn the screw more than 2 turns in either

direction (± 1 turn is equivalent to ± 15% null shift).

adjusting, watch the actuator (motor) motion to find the null

position. With overlapped valves, turn the null adjust screw carefully in

both directions to just start motion and then back into deadzone

midposition between those two screw positions.

proper null adjustment, reconnect the command signal lead and

install protective cover screw again.

8. TOOLS AND EQUIPMENT

a.5mm Allen wrench

b.3mm Allen wrench

blade screwdriver

screwdriver

r or small screwdriver

grease (mounting and insertion of O-rings)

The D661 Series valves require tools for installation, set up, null

adjustment and filter replacement.

➢

Installation of the valve

➢

Mounting of the D661 Series requires 5mm Allen wrench

➢

Null adjust of the valve at set up

➢

Large blade screwdriver to remove the cover screw

(see cut-away diagram on page 1)

➢

Small screwdriver for zero setting on internal potentiometer

Replacement Parts

Part Number

O-Ring, ports P, T, A, B, (T

)all542082-004

O-Ring, ports X&Yall242082-011

Replaceable A/B1A67999 200

Replaceable Filter Disk

G, S, H & P...F/G1A67999 100

O-Ring, behind filter diskall1A25163 013 015

O-Ring, for A/B1B97009 080

O-Ring, for filter cover

G, S, H1A25163 017 020

Allen Setscrew, ports X & YG & P266166 040 006

Screw plug, port XS & H166098 040 006

Seal, port XS & H1A25528 040

Accessories

(not part of the valve delivery)

Part Number

Mating Connector,

waterproof, protection IP65

6+PE-poleDIN 43563B97007 061

11+PE-poleDIN 43651B97024 111

11+1-pole (Bayonet)MIL C-26482/14-12B97027 012

6-poleMIL C-5015/14S-6A26201 004

12-pole (Bayonet)MIL C-26482/14-12B97027 012

Mounting ManifoldsSee special data sheet

Mounting Bolts

M6x60 DIN G and ...P4A03665-060-060

M6x55 DIN H and ...S4A03665-060-055

Flushing PlateB67728-001

Flushing PlateB67728-002

Flushing PlateB67728-003

9. TROUBLESHOOTING CHART

The following troubleshooting chart lists potential troubles encountered, probable causes and remedies.

Potential Trouble

Leakage at the mounting surface

of the valve.

Probable Cause

1. Seals damaged or missing.

2. Required torque is incorrect.

Remedy

1. Make sure all seals are installed at ports A, B, P, T, X and Y are ok.

2. Tighten mounting bolts.

No hydraulic response of the

valve.

Instability of the system, plant

oscillates.

With zero command signal, the

load drifts slowly off position

(open loop).

With hydraulics on, valve goes

hardover.

1. Loss of hydraulic pressure.

2. Loss of supply voltage.

1. Unstable external loop.

2. Valve electronics defective.

1. Power supply problem.

2. Incorrect null adjust.

1. Check all signals from Pin A to Pin F.

2. Check the mating connector for corrosion.

1. Check whether output signal at Pin F (6) is following exactly the command signal at Pin D.

2. Send to Moog factory for repair.

1. With ±15 VDC supply, check for supply voltage at pins A and B being stable within ±3% of 15V

2. With both ±15 VDC and 24 VDC supply, at zero command and normal operation temperature,

stop load motion by adjusting nulladjust potentiometer (behind screw plug).

1. Send to Moog factory for repair.

1. Orifice contaminated.

10. AUTHORIZED REPAIR FACILITIES

If servovalve continues to malfunction after all recommended

corrective action procedures are performed, defective valve should be

returned to Moog for repair. Moog does not authorize any facilities other

than Moog or Moog subsidiaries to repair its servovalves. It is

recommended you contact Moog at (716)655-3000 to locate your closest

Moog repair facility. Repair by an independent (unauthorized) repair

house will result in voiding the Moog warranty and could lead to

performance degradation or safety problems.

11. DECLARATION OF MANUFACTURER

A Declaration of Manufacturer according to EC machine directive 89/

392/EWG, Annex II B, is available for servo and proportional valves D661

Series and will be supplied upon request.

ORDERING INFORMATION

Model-Number

Type designation

ssssssssssss

D661-G, S and H

sssss

Specification status

–

Series specification

Preseries specification

Special specification

Electric supply

± 15 VDC

24 VDC

± 3%

(18-32 VDC)

Signals for 100% spool stroke

Model designation

assigned at the factory

Factory identification

Valve version

GStandard bushing, without mechanical feedback

= 100 % p

, only possible with external Y

Standard bushing, with mechanical feedback

max. 100 bar

High response bushing, with mechanical feedback

max. 100 bar

Valve connector

6+ PE-pole EN 175201 Part 804

11+ PE-pole EN 175201 Part 804

Command

±10 V

±10 mA

Output

±10 V

±10 mA

Seal material

NBRStandard

FPM(Viton) optional

others on request

Rated flow

[l/min] at Dp

Valve version

70 bar10 bar

120

140

170

–

Pilot connections

Former Code

A, J

C, L

B, K

D, M

Supply

internal

external

internal

Return

internal

external

Valve vers.

G, S, H

With curvilinear characteristic (Y)

reduced rated flow (see curves)

Spool position without electric supply

undefined

P➔ B, A➔ T interconnected

Mid position by mech. feedback

valve version G only

valve versions S and H only

Maximum operating pressure

210 p

≤ 210 bar (X and Y external) operating pressure

in ports P, A, B

and T up to 350 bar possible.

350 bar(with dropping orifice in filter cover)

Pilot stage version (pilot pressure 15 to 210 bar)

Bushing / spool type

4- way: critical lap, linear characteristic

4- way: critical lap, curvilinear characteristic, > Q

=80 l/min

Special bushing on request

Pilot flow at p

= 140 bar

without mechanical feedback

with mechanical feedback

Servojet

Valve version

1.15 l/min

0.65 l/min

–

Preferred configurations are highlighted.

All combinations may not be available.

Options may increase price.

Technical changes are reserved.

Model-NumberType designation